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Remove GOST and STREEBOG support from libssl.

This version of GOST is old and not anywhere close to compliant with
modern GOST standards. It is also very intrusive in libssl and
makes a mess everywhere.  Efforts to entice a suitably minded anyone
to care about it have been unsuccessful.

At this point it is probably best to remove this, and if someone
ever showed up who truly needed a working version, it should be
a clean implementation from scratch, and have it use something
closer to the typical API in libcrypto so it would integrate less
painfully here.

This removes it from libssl in preparation for it's removal from
libcrypto with a future major bump

ok tb@

/* $OpenBSD: ssl_cert.c,v 1.108 2024/02/03 15:58:33 beck Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#include <sys/types.h>

#include <dirent.h>
#include <stdio.h>
#include <unistd.h>

#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/objects.h>
#include <openssl/opensslconf.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>

#include "ssl_local.h"

int
SSL_get_ex_data_X509_STORE_CTX_idx(void)
{
	static volatile int ssl_x509_store_ctx_idx = -1;
	int got_write_lock = 0;

	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);

	if (ssl_x509_store_ctx_idx < 0) {
		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
		got_write_lock = 1;

		if (ssl_x509_store_ctx_idx < 0) {
			ssl_x509_store_ctx_idx =
			    X509_STORE_CTX_get_ex_new_index(
				0, "SSL for verify callback", NULL, NULL, NULL);
		}
	}

	if (got_write_lock)
		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
	else
		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

	return ssl_x509_store_ctx_idx;
}
LSSL_ALIAS(SSL_get_ex_data_X509_STORE_CTX_idx);

SSL_CERT *
ssl_cert_new(void)
{
	SSL_CERT *ret;

	ret = calloc(1, sizeof(SSL_CERT));
	if (ret == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}
	ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
	ret->references = 1;
	ret->security_cb = ssl_security_default_cb;
	ret->security_level = OPENSSL_TLS_SECURITY_LEVEL;
	ret->security_ex_data = NULL;
	return (ret);
}

SSL_CERT *
ssl_cert_dup(SSL_CERT *cert)
{
	SSL_CERT *ret;
	int i;

	ret = calloc(1, sizeof(SSL_CERT));
	if (ret == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}

	/*
	 * same as ret->key = ret->pkeys + (cert->key - cert->pkeys),
	 * if you find that more readable
	 */
	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];

	ret->valid = cert->valid;
	ret->mask_k = cert->mask_k;
	ret->mask_a = cert->mask_a;

	if (cert->dhe_params != NULL) {
		ret->dhe_params = DHparams_dup(cert->dhe_params);
		if (ret->dhe_params == NULL) {
			SSLerrorx(ERR_R_DH_LIB);
			goto err;
		}
	}
	ret->dhe_params_cb = cert->dhe_params_cb;
	ret->dhe_params_auto = cert->dhe_params_auto;

	for (i = 0; i < SSL_PKEY_NUM; i++) {
		if (cert->pkeys[i].x509 != NULL) {
			ret->pkeys[i].x509 = cert->pkeys[i].x509;
			X509_up_ref(ret->pkeys[i].x509);
		}

		if (cert->pkeys[i].privatekey != NULL) {
			ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
			EVP_PKEY_up_ref(ret->pkeys[i].privatekey);
			switch (i) {
				/*
				 * If there was anything special to do for
				 * certain types of keys, we'd do it here.
				 * (Nothing at the moment, I think.)
				 */

			case SSL_PKEY_RSA:
				/* We have an RSA key. */
				break;

			case SSL_PKEY_ECC:
				/* We have an ECC key */
				break;

			default:
				/* Can't happen. */
				SSLerrorx(SSL_R_LIBRARY_BUG);
			}
		}

		if (cert->pkeys[i].chain != NULL) {
			if ((ret->pkeys[i].chain =
			    X509_chain_up_ref(cert->pkeys[i].chain)) == NULL)
				goto err;
		}
	}

	ret->security_cb = cert->security_cb;
	ret->security_level = cert->security_level;
	ret->security_ex_data = cert->security_ex_data;

	/*
	 * ret->extra_certs *should* exist, but currently the own certificate
	 * chain is held inside SSL_CTX
	 */

	ret->references = 1;

	return (ret);

 err:
	DH_free(ret->dhe_params);

	for (i = 0; i < SSL_PKEY_NUM; i++) {
		X509_free(ret->pkeys[i].x509);
		EVP_PKEY_free(ret->pkeys[i].privatekey);
		sk_X509_pop_free(ret->pkeys[i].chain, X509_free);
	}
	free (ret);
	return NULL;
}


void
ssl_cert_free(SSL_CERT *c)
{
	int i;

	if (c == NULL)
		return;

	i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
	if (i > 0)
		return;

	DH_free(c->dhe_params);

	for (i = 0; i < SSL_PKEY_NUM; i++) {
		X509_free(c->pkeys[i].x509);
		EVP_PKEY_free(c->pkeys[i].privatekey);
		sk_X509_pop_free(c->pkeys[i].chain, X509_free);
	}

	free(c);
}

SSL_CERT *
ssl_get0_cert(SSL_CTX *ctx, SSL *ssl)
{
	if (ssl != NULL)
		return ssl->cert;

	return ctx->cert;
}

int
ssl_cert_set0_chain(SSL_CTX *ctx, SSL *ssl, STACK_OF(X509) *chain)
{
	SSL_CERT *ssl_cert;
	SSL_CERT_PKEY *cpk;
	X509 *x509;
	int ssl_err;
	int i;

	if ((ssl_cert = ssl_get0_cert(ctx, ssl)) == NULL)
		return 0;

	if ((cpk = ssl_cert->key) == NULL)
		return 0;

	for (i = 0; i < sk_X509_num(chain); i++) {
		x509 = sk_X509_value(chain, i);
		if (!ssl_security_cert(ctx, ssl, x509, 0, &ssl_err)) {
			SSLerrorx(ssl_err);
			return 0;
		}
	}

	sk_X509_pop_free(cpk->chain, X509_free);
	cpk->chain = chain;

	return 1;
}

int
ssl_cert_set1_chain(SSL_CTX *ctx, SSL *ssl, STACK_OF(X509) *chain)
{
	STACK_OF(X509) *new_chain = NULL;

	if (chain != NULL) {
		if ((new_chain = X509_chain_up_ref(chain)) == NULL)
			return 0;
	}
	if (!ssl_cert_set0_chain(ctx, ssl, new_chain)) {
		sk_X509_pop_free(new_chain, X509_free);
		return 0;
	}

	return 1;
}

int
ssl_cert_add0_chain_cert(SSL_CTX *ctx, SSL *ssl, X509 *cert)
{
	SSL_CERT *ssl_cert;
	SSL_CERT_PKEY *cpk;
	int ssl_err;

	if ((ssl_cert = ssl_get0_cert(ctx, ssl)) == NULL)
		return 0;

	if ((cpk = ssl_cert->key) == NULL)
		return 0;

	if (!ssl_security_cert(ctx, ssl, cert, 0, &ssl_err)) {
		SSLerrorx(ssl_err);
		return 0;
	}

	if (cpk->chain == NULL) {
		if ((cpk->chain = sk_X509_new_null()) == NULL)
			return 0;
	}
	if (!sk_X509_push(cpk->chain, cert))
		return 0;

	return 1;
}

int
ssl_cert_add1_chain_cert(SSL_CTX *ctx, SSL *ssl, X509 *cert)
{
	if (!ssl_cert_add0_chain_cert(ctx, ssl, cert))
		return 0;

	X509_up_ref(cert);

	return 1;
}

int
ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *certs)
{
	X509_STORE_CTX *ctx = NULL;
	X509_VERIFY_PARAM *param;
	X509 *cert;
	int ret = 0;

	if (sk_X509_num(certs) < 1)
		goto err;

	if ((ctx = X509_STORE_CTX_new()) == NULL)
		goto err;

	cert = sk_X509_value(certs, 0);
	if (!X509_STORE_CTX_init(ctx, s->ctx->cert_store, cert, certs)) {
		SSLerror(s, ERR_R_X509_LIB);
		goto err;
	}
	X509_STORE_CTX_set_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);

	/*
	 * We need to inherit the verify parameters. These can be
	 * determined by the context: if its a server it will verify
	 * SSL client certificates or vice versa.
	 */
	X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");

	param = X509_STORE_CTX_get0_param(ctx);

	X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));

	/*
	 * Anything non-default in "param" should overwrite anything
	 * in the ctx.
	 */
	X509_VERIFY_PARAM_set1(param, s->param);

	if (s->verify_callback)
		X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);

	if (s->ctx->app_verify_callback != NULL)
		ret = s->ctx->app_verify_callback(ctx,
		    s->ctx->app_verify_arg);
	else
		ret = X509_verify_cert(ctx);

	s->verify_result = X509_STORE_CTX_get_error(ctx);
	sk_X509_pop_free(s->s3->hs.verified_chain, X509_free);
	s->s3->hs.verified_chain = NULL;
	if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
		s->s3->hs.verified_chain = X509_STORE_CTX_get1_chain(ctx);
		if (s->s3->hs.verified_chain == NULL) {
			SSLerrorx(ERR_R_MALLOC_FAILURE);
			ret = 0;
		}
	}

 err:
	X509_STORE_CTX_free(ctx);

	return (ret);
}

static void
set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
    STACK_OF(X509_NAME) *name_list)
{
	sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
	*ca_list = name_list;
}

STACK_OF(X509_NAME) *
SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
{
	int i;
	STACK_OF(X509_NAME) *ret;
	X509_NAME *name = NULL;

	if ((ret = sk_X509_NAME_new_null()) == NULL)
		goto err;

	for (i = 0; i < sk_X509_NAME_num(sk); i++) {
		if ((name = X509_NAME_dup(sk_X509_NAME_value(sk, i))) == NULL)
			goto err;
		if (!sk_X509_NAME_push(ret, name))
			goto err;
	}
	return (ret);

 err:
	X509_NAME_free(name);
	sk_X509_NAME_pop_free(ret, X509_NAME_free);
	return NULL;
}
LSSL_ALIAS(SSL_dup_CA_list);

void
SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
{
	set_client_CA_list(&(s->client_CA), name_list);
}
LSSL_ALIAS(SSL_set_client_CA_list);

void
SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
{
	set_client_CA_list(&(ctx->client_CA), name_list);
}
LSSL_ALIAS(SSL_CTX_set_client_CA_list);

STACK_OF(X509_NAME) *
SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
{
	return (ctx->client_CA);
}
LSSL_ALIAS(SSL_CTX_get_client_CA_list);

STACK_OF(X509_NAME) *
SSL_get_client_CA_list(const SSL *s)
{
	if (!s->server) {
		/* We are in the client. */
		if ((s->version >> 8) == SSL3_VERSION_MAJOR)
			return (s->s3->hs.tls12.ca_names);
		else
			return (NULL);
	} else {
		if (s->client_CA != NULL)
			return (s->client_CA);
		else
			return (s->ctx->client_CA);
	}
}
LSSL_ALIAS(SSL_get_client_CA_list);

static int
add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
{
	X509_NAME *name;

	if (x == NULL)
		return (0);
	if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
		return (0);

	if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
		return (0);

	if (!sk_X509_NAME_push(*sk, name)) {
		X509_NAME_free(name);
		return (0);
	}
	return (1);
}

int
SSL_add_client_CA(SSL *ssl, X509 *x)
{
	return (add_client_CA(&(ssl->client_CA), x));
}
LSSL_ALIAS(SSL_add_client_CA);

int
SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
{
	return (add_client_CA(&(ctx->client_CA), x));
}
LSSL_ALIAS(SSL_CTX_add_client_CA);

static int
xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
{
	return (X509_NAME_cmp(*a, *b));
}

/*!
 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 * it doesn't really have anything to do with clients (except that a common use
 * for a stack of CAs is to send it to the client). Actually, it doesn't have
 * much to do with CAs, either, since it will load any old cert.
 * \param file the file containing one or more certs.
 * \return a ::STACK containing the certs.
 */
STACK_OF(X509_NAME) *
SSL_load_client_CA_file(const char *file)
{
	BIO *in;
	X509 *x = NULL;
	X509_NAME *xn = NULL;
	STACK_OF(X509_NAME) *ret = NULL, *sk;

	sk = sk_X509_NAME_new(xname_cmp);

	in = BIO_new(BIO_s_file());

	if ((sk == NULL) || (in == NULL)) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		goto err;
	}

	if (!BIO_read_filename(in, file))
		goto err;

	for (;;) {
		if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
			break;
		if (ret == NULL) {
			ret = sk_X509_NAME_new_null();
			if (ret == NULL) {
				SSLerrorx(ERR_R_MALLOC_FAILURE);
				goto err;
			}
		}
		if ((xn = X509_get_subject_name(x)) == NULL)
			goto err;
		/* check for duplicates */
		xn = X509_NAME_dup(xn);
		if (xn == NULL)
			goto err;
		if (sk_X509_NAME_find(sk, xn) >= 0)
			X509_NAME_free(xn);
		else {
			if (!sk_X509_NAME_push(sk, xn))
				goto err;
			if (!sk_X509_NAME_push(ret, xn))
				goto err;
		}
	}

	if (0) {
 err:
		sk_X509_NAME_pop_free(ret, X509_NAME_free);
		ret = NULL;
	}
	sk_X509_NAME_free(sk);
	BIO_free(in);
	X509_free(x);
	if (ret != NULL)
		ERR_clear_error();

	return (ret);
}
LSSL_ALIAS(SSL_load_client_CA_file);

/*!
 * Add a file of certs to a stack.
 * \param stack the stack to add to.
 * \param file the file to add from. All certs in this file that are not
 * already in the stack will be added.
 * \return 1 for success, 0 for failure. Note that in the case of failure some
 * certs may have been added to \c stack.
 */

int
SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
    const char *file)
{
	BIO *in;
	X509 *x = NULL;
	X509_NAME *xn = NULL;
	int ret = 1;
	int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);

	oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);

	in = BIO_new(BIO_s_file());

	if (in == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		goto err;
	}

	if (!BIO_read_filename(in, file))
		goto err;

	for (;;) {
		if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
			break;
		if ((xn = X509_get_subject_name(x)) == NULL)
			goto err;
		xn = X509_NAME_dup(xn);
		if (xn == NULL)
			goto err;
		if (sk_X509_NAME_find(stack, xn) >= 0)
			X509_NAME_free(xn);
		else
			if (!sk_X509_NAME_push(stack, xn))
				goto err;
	}

	ERR_clear_error();

	if (0) {
 err:
		ret = 0;
	}
	BIO_free(in);
	X509_free(x);

	(void)sk_X509_NAME_set_cmp_func(stack, oldcmp);

	return ret;
}
LSSL_ALIAS(SSL_add_file_cert_subjects_to_stack);

/*!
 * Add a directory of certs to a stack.
 * \param stack the stack to append to.
 * \param dir the directory to append from. All files in this directory will be
 * examined as potential certs. Any that are acceptable to
 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will
 * be included.
 * \return 1 for success, 0 for failure. Note that in the case of failure some
 * certs may have been added to \c stack.
 */

int
SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir)
{
	DIR *dirp = NULL;
	char *path = NULL;
	int ret = 0;

	dirp = opendir(dir);
	if (dirp) {
		struct dirent *dp;
		while ((dp = readdir(dirp)) != NULL) {
			if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) {
				ret = SSL_add_file_cert_subjects_to_stack(
				    stack, path);
				free(path);
			}
			if (!ret)
				break;
		}
		(void) closedir(dirp);
	}
	if (!ret) {
 		SYSerror(errno);
		ERR_asprintf_error_data("opendir ('%s')", dir);
		SSLerrorx(ERR_R_SYS_LIB);
	}
	return ret;
}
LSSL_ALIAS(SSL_add_dir_cert_subjects_to_stack);